Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / ide / falconide.c

diff --git a/kernel/drivers/ide/falconide.c b/kernel/drivers/ide/falconide.c
new file mode 100644 (file)
index 0000000..a5a07cc
--- /dev/null
+++ b/kernel/drivers/ide/falconide.c
@@ -0,0 +1,178 @@
+/*
+ *  Atari Falcon IDE Driver
+ *
+ *     Created 12 Jul 1997 by Geert Uytterhoeven
+ *
+ *  This file is subject to the terms and conditions of the GNU General Public
+ *  License.  See the file COPYING in the main directory of this archive for
+ *  more details.
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/mm.h>
+#include <linux/interrupt.h>
+#include <linux/blkdev.h>
+#include <linux/ide.h>
+#include <linux/init.h>
+
+#include <asm/setup.h>
+#include <asm/atarihw.h>
+#include <asm/atariints.h>
+#include <asm/atari_stdma.h>
+#include <asm/ide.h>
+
+#define DRV_NAME "falconide"
+
+    /*
+     *  Base of the IDE interface
+     */
+
+#define ATA_HD_BASE    0xfff00000
+
+    /*
+     *  Offsets from the above base
+     */
+
+#define ATA_HD_CONTROL 0x39
+
+    /*
+     *  falconide_intr_lock is used to obtain access to the IDE interrupt,
+     *  which is shared between several drivers.
+     */
+
+static int falconide_intr_lock;
+
+static void falconide_release_lock(void)
+{
+       if (falconide_intr_lock == 0) {
+               printk(KERN_ERR "%s: bug\n", __func__);
+               return;
+       }
+       falconide_intr_lock = 0;
+       stdma_release();
+}
+
+static void falconide_get_lock(irq_handler_t handler, void *data)
+{
+       if (falconide_intr_lock == 0) {
+               if (in_interrupt() > 0)
+                       panic("Falcon IDE hasn't ST-DMA lock in interrupt");
+               stdma_lock(handler, data);
+               falconide_intr_lock = 1;
+       }
+}
+
+static void falconide_input_data(ide_drive_t *drive, struct ide_cmd *cmd,
+                                void *buf, unsigned int len)
+{
+       unsigned long data_addr = drive->hwif->io_ports.data_addr;
+
+       if (drive->media == ide_disk && cmd && (cmd->tf_flags & IDE_TFLAG_FS)) {
+               __ide_mm_insw(data_addr, buf, (len + 1) / 2);
+               return;
+       }
+
+       raw_insw_swapw((u16 *)data_addr, buf, (len + 1) / 2);
+}
+
+static void falconide_output_data(ide_drive_t *drive, struct ide_cmd *cmd,
+                                 void *buf, unsigned int len)
+{
+       unsigned long data_addr = drive->hwif->io_ports.data_addr;
+
+       if (drive->media == ide_disk && cmd && (cmd->tf_flags & IDE_TFLAG_FS)) {
+               __ide_mm_outsw(data_addr, buf, (len + 1) / 2);
+               return;
+       }
+
+       raw_outsw_swapw((u16 *)data_addr, buf, (len + 1) / 2);
+}
+
+/* Atari has a byte-swapped IDE interface */
+static const struct ide_tp_ops falconide_tp_ops = {
+       .exec_command           = ide_exec_command,
+       .read_status            = ide_read_status,
+       .read_altstatus         = ide_read_altstatus,
+       .write_devctl           = ide_write_devctl,
+
+       .dev_select             = ide_dev_select,
+       .tf_load                = ide_tf_load,
+       .tf_read                = ide_tf_read,
+
+       .input_data             = falconide_input_data,
+       .output_data            = falconide_output_data,
+};
+
+static const struct ide_port_info falconide_port_info = {
+       .get_lock               = falconide_get_lock,
+       .release_lock           = falconide_release_lock,
+       .tp_ops                 = &falconide_tp_ops,
+       .host_flags             = IDE_HFLAG_MMIO | IDE_HFLAG_SERIALIZE |
+                                 IDE_HFLAG_NO_DMA,
+       .irq_flags              = IRQF_SHARED,
+       .chipset                = ide_generic,
+};
+
+static void __init falconide_setup_ports(struct ide_hw *hw)
+{
+       int i;
+
+       memset(hw, 0, sizeof(*hw));
+
+       hw->io_ports.data_addr = ATA_HD_BASE;
+
+       for (i = 1; i < 8; i++)
+               hw->io_ports_array[i] = ATA_HD_BASE + 1 + i * 4;
+
+       hw->io_ports.ctl_addr = ATA_HD_BASE + ATA_HD_CONTROL;
+
+       hw->irq = IRQ_MFP_IDE;
+}
+
+    /*
+     *  Probe for a Falcon IDE interface
+     */
+
+static int __init falconide_init(void)
+{
+       struct ide_host *host;
+       struct ide_hw hw, *hws[] = { &hw };
+       int rc;
+
+       if (!MACH_IS_ATARI || !ATARIHW_PRESENT(IDE))
+               return -ENODEV;
+
+       printk(KERN_INFO "ide: Falcon IDE controller\n");
+
+       if (!request_mem_region(ATA_HD_BASE, 0x40, DRV_NAME)) {
+               printk(KERN_ERR "%s: resources busy\n", DRV_NAME);
+               return -EBUSY;
+       }
+
+       falconide_setup_ports(&hw);
+
+       host = ide_host_alloc(&falconide_port_info, hws, 1);
+       if (host == NULL) {
+               rc = -ENOMEM;
+               goto err;
+       }
+
+       falconide_get_lock(NULL, NULL);
+       rc = ide_host_register(host, &falconide_port_info, hws);
+       falconide_release_lock();
+
+       if (rc)
+               goto err_free;
+
+       return 0;
+err_free:
+       ide_host_free(host);
+err:
+       release_mem_region(ATA_HD_BASE, 0x40);
+       return rc;
+}
+
+module_init(falconide_init);
+
+MODULE_LICENSE("GPL");